Duct passing through a wall aperture

ABSTRACT

A duct for extending through an aperture in a wall or partition and comprising a sleeve and outwardly extending flanges to overlie the opposed outer surfaces of the wall or partition at the opposite ends of the sleeve and at least one of the flanges being constructed to be pushed onto an end of the sleeve to lockingly engage the sleeve end.

This invention concerns a duct adapted to extend through an aperture ina wall or partition, particularly, though by no means exclusivelysuitable for locating a pipe or cable passing therethrough.

Generally such pipe or cable is located in a sleeve passing through thewall and an annular cover plate surrounds the pipe or cable on each sideof the wall. Conventional cover plates are often in two halves to enablethem to be fitted around the pipe. They are quite loose and areessentially for cosmetic purposes and do nothing to form an effectiveseal between the pipe and wall surfaces.

DE-A-42WO866 discloses a duct extending through an aperture in a walland having a sleeve provided with threaded portions. Mastic is used toprovide a seal between the sleeve and the wall to prevent water enteringthe aperture in the wall. Flanges, which hold the mastic in place, areprovided with threaded portions for engagement with respective threadedportions on the sleeve.

US-A-4385777 discloses an arrangement for covering a hole around a pipewhere the pipe emerges from a wall. The arrangement includes a coverplate with an insert of flexible material to prevent propagation ofnoise from the pipe to the wall.

It is amongst the objects of the invention to provide an improvedarrangement for locating such pipes or cables.

According to the invention there is provided a duct adapted to extendthrough an aperture in a wall or partition and comprising a sleeve andoutwardly extending flanges adapted to overlie the opposed outersurfaces of the wall or partition at the opposite ends of the sleeve, atleast one of said flanges being adapted to be pushed onto an end of thesleeve to lockingly engage same.

Both flanges may be adapted to be pushed onto the ends of the sleeve tolockingly engage same.

One of said flanges may be integrally formed with the sleeve.

The outer surface of the sleeve may be provided with axially spacedformulations which cooperate with means on the inner periphery of aflange to ensure the locking engagement.

The formations on the sleeve may comprise circumferential ribs and themeans on said flange may comprise an inwardly directly circumferentialtooth.

The flanges may be of generally convex form whereby their peripheraledges engage the wall or partition surfaces with their central partsengaging the sleeve being outwardly spaced from the wall or partitionsurfaces.

The sleeve may locate a pipe or cable passing therethrough, the flangesforming muffs therearound.

One or both flanges may be integral with other formations to enableperformance of an additional function.

The central aperture of at least one flange may be closed by a mesh orgrid, the entire assembly forming a substitute for an airbrick or otherknown venting arrangement.

The sleeve may be cut from an extended length thereof.

The invention will be further apparent from the following description,with references to the figures of the accompanying drawings, which show,by way of example only, one form of duct arrangement embodying same andfor locating a pipe or cable passing through a wall.

Of the drawings:

FIG. 1 shows a front elevation of the arrangement from one side of awall;

FIG. 2 shows a side elevation of the arrangement from one side of thewall; and

FIG. 3 shows a cross-section through the arrangement

Referring now to the drawings, it will be seen that a pipe P passesthrough a wall W.

The pipe P is located through a sleeve 10 which extends through a bore Bin the wall W.

The sleeve which is of a plastics material is provided with axiallyspaced circumferential ribs 11 on its outer surface. The sleeve may becut from an extended length thereof to suit the thickness of wall to betraversed.

Two pipe muffs 12 in the form of flanges are provided, one on each ofthe opposite sides of the wall W.

Each muff 12 is in the form of a domed shell 13 having an inwardlydirected centrally located annular portion 14 provided with acircumferential tooth 15 on the inner surface of the annulus.

In use the muffs are located over the pipe P and pushed onto the ends ofthe sleeve to cause their peripheral edges to engage the wall surfacesand the teeth 15 lockingly to engage spaces between adjacent ribs 11.

One or both ends of the sleeve 10 may be tied with a knife as necessaryto lie below recesses 16 formed in the outer surfaces of the muff 12which receive and locate sealing washers or grommets 17.

The entire arrangement is sturdy, of neat appearance and forms aneffective seal.

It will be appreciated that it is not intended to limit the invention tothe above example only, many variations, such as might readily occur toone skilled in the art, being possible, without departing from the scopethereof, as defined by the appended claims.

Thus, for example one of the flanges may be integral with the sleeve.

The sleeve need not locate a pipe or cable it may itself save as aconduit for a fluid medium.

One or both of the flanges may be integral with other formations such asa me or grid closing the central aperture to enable the assembly ofsleeve and flanges to act as a replacement for an air-brick or othervent.

The sleeve may extend outwardly from one or both of the flanges forconnection to hoses or the like.

I claim:
 1. A duct for extension through an aperture in a wall orpartition comprising a sleeve and outwardly extending flanges foroverlying an outer surface of a wall or partition at opposite ends ofsaid sleeve, with outer surfaces of said sleeve being provided withaxially spaced formations cooperable with means provided on an innerperiphery of, at least, one of said flanges, thereby enabling saidflange and said sleeve to be locked together as a result of a push-fitengagement therebetween.
 2. A duct according to claim 1, wherein to ofsaid flanges are provided with said locking means.
 3. A duct accordingto claim 2 wherein the sleeve is cut from an extended length thereof. 4.A duct according to claim 1, wherein one of said flanges is integrallyformed with the sleeve.
 5. A duct according to claim 1, wherein theformations on the sleeve comprise circumferential ribs and the means onsaid flange comprises an inwardly directed circumferential tooth.
 6. Aduct according to claim 1, wherein the flanges are of generally convexform whereby their peripheral edges engage the wall or partitionsurfaces with their central parts engaging the sleeve being outwardlyspaced from the wall or partition surfaces.
 7. A duct according to claim1, wherein the sleeve locates a pipe or cable passing therethrough, theflanges forming muffs therearound.
 8. A duct according to claims 1,wherein the central aperture of at least one flange has extendingthereacross a mesh or grid, the entire assembly forming a substitute fora venting arrangements.